Her post comes as Sadiq wrote to his own 457,000 followers earlier, saying: "There has been a serious incident near to Parliament Square."

*FIRST PICTURE OF LONDON ATTACK SUSPECT EMERGES*

A longer message on his account read: "I have spoken to the Acting Commissioner. The Metropolitan Police Service i dealing with the incident and an urgent investigation is underway. My thoughts are with those affect and their families.

"I would like to express my thanks to the police and emergency services who work so hard to keep us safe and show tremendous bravery in exceptionally difficult circumstances."

SADIQ KHAN: Posted a statement to Twitter (Image: TWITTER)

A fan then replied to Katie's attack, sharing a screenshot of an Independent article from last September with the headline: "Sadiq Khan: London mayor says terror attacks 'part and parcel' of living in a major city."

The article discusses how the Labour politician says capital cities "have got to be prepared" for attacks.

Another fan wrote back: "Khan'ts feeble statement? Shameful little man. Stand up and be counted if you think you're one of us!!"

Someone else added: "Khan released statement on Sky. Not one mention of the fallen Officer. He really has to go?"

STATEMENT: Sadiq spoke out (Image: TWITTER)

However, not everyone agreed with Katie's viewpoint.

One fan asked Celebrity Big Brother star Katie: "What would you like him to do?"

While a second bit back: "Your heart must be even tinier than I thought if you're making political points out of this. It is you who should think again."